5
5. Sensor Wiring
Each RL8025 comes with a standard 20-foot weather resistant poly cable.
1.
Route each sensor cable so they will not be damaged or cut. Cable should
not be routed near heat sources greater than 150
°
F. Do not shorten any
sensor cable.
2.
Attach red (+) and black (–) leads to a power source (either a metered
power supply @ 10 VDC or a 9-volt battery). Attach a digital volt meter
to the green (+) and white (–) leads. If output reads +15 mV or less, the
sensors are ready for use. If output is over +15 mV, loosen the bolts and
retighten, alternating the bolts to keep the output below +15 mV. Continue
until 25 ft. lbs is reached.
3.
Connect the sensors to the junction box which should be mounted outside
of the insulation for easy access. Refer to the guide shown on page 6 and
the labels on the the terminal strips of the junction box for correct wiring.
To verify the wiring scheme, see the certification shipped with the sensor.
No summing board is necessary.
4. Insulation
All outdoor applications require insulation to obtain the best accuracy level. After
mounting the sensors out of direct sunlight, place a piece of 2' x 2' insulation around
the section of the leg, or attach the 2'x 2' square to the skirt to cover the sensor and
the surrounding area as shown in the following illustration.
Figure 4. Location of Insulation Wrap
2' x 2'
Insulation
patch
Insulation
wrap
2 FT.